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Summary: Inherited Fields | Ctors | Methods | Inherited Methods

# PipedWriter

`public class PipedWriter`
`` `extends Writer` ``

java.lang.Object
↳ | java.io.Writer
| ↳ | java.io.PipedWriter

Piped character-output streams.

## Summary

### Inherited fields
From class `java.io.Writer`
`protected Object` | `lock` The object used to synchronize operations on this stream.

### Public constructors
`PipedWriter(PipedReader snk)` Creates a piped writer connected to the specified piped reader.
`PipedWriter()` Creates a piped writer that is not yet connected to a piped reader.

### Public methods
`void` | `close()` Closes this piped output stream and releases any system resources associated with this stream.
`void` | `connect(PipedReader snk)` Connects this piped writer to a receiver.
`void` | `flush()` Flushes this output stream and forces any buffered output characters to be written out.
`void` | `write(int c)` Writes the specified `char` to the piped output stream.
`void` | `write(char[] cbuf, int off, int len)` Writes `len` characters from the specified character array starting at offset `off` to this piped output stream.

### Inherited methods
From class `java.io.Writer`
`Writer` | `append(char c)` Appends the specified character to this writer.
`Writer` | `append(CharSequence csq, int start, int end)` Appends a subsequence of the specified character sequence to this writer.
`Writer` | `append(CharSequence csq)` Appends the specified character sequence to this writer.
`abstract void` | `close()` Closes the stream, flushing it first.
`abstract void` | `flush()` Flushes the stream.
`void` | `write(String str)` Writes a string.
`void` | `write(int c)` Writes a single character.
`void` | `write(String str, int off, int len)` Writes a portion of a string.
`abstract void` | `write(char[] cbuf, int off, int len)` Writes a portion of an array of characters.
`void` | `write(char[] cbuf)` Writes an array of characters.
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
From interface `java.lang.Appendable`
`abstract Appendable` | `append(char c)` Appends the specified character to this `Appendable`.
`abstract Appendable` | `append(CharSequence csq, int start, int end)` Appends a subsequence of the specified character sequence to this `Appendable`.
`abstract Appendable` | `append(CharSequence csq)` Appends the specified character sequence to this `Appendable`.
From interface `java.io.Closeable`
`abstract void` | `close()` Closes this stream and releases any system resources associated with it.
From interface `java.io.Flushable`
`abstract void` | `flush()` Flushes this stream by writing any buffered output to the underlying stream.
From interface `java.lang.AutoCloseable`
`abstract void` | `close()` Closes this resource, relinquishing any underlying resources.

## Public constructors

### PipedWriter

    public PipedWriter (PipedReader snk)

Creates a piped writer connected to the specified piped reader. Data characters written to this stream will then be available as input from `snk`.

Parameters
`snk` | `PipedReader`: The piped reader to connect to.

Throws
`IOException` | if an I/O error occurs.

### PipedWriter

    public PipedWriter ()

Creates a piped writer that is not yet connected to a piped reader. It must be connected to a piped reader, either by the receiver or the sender, before being used.

See also:

- `PipedReader.connect(java.io.PipedWriter)`
- `connect(java.io.PipedReader)`

## Public methods

### close

    public void close ()

Closes this piped output stream and releases any system resources associated with this stream. This stream may no longer be used for writing characters.

Throws
`IOException` | if an I/O error occurs.

### connect

    public void connect (PipedReader snk)

Connects this piped writer to a receiver. If this object is already connected to some other piped reader, an `IOException` is thrown.

If `snk` is an unconnected piped reader and `src` is an unconnected piped writer, they may be connected by either the call:

>      src.connect(snk)

or the call:

>      snk.connect(src)

The two calls have the same effect.

Parameters
`snk` | `PipedReader`: the piped reader to connect to.

Throws
`IOException` | if an I/O error occurs.

### flush

    public void flush ()

Flushes this output stream and forces any buffered output characters to be written out. This will notify any readers that characters are waiting in the pipe.

Throws
`IOException` | if the pipe is closed, or an I/O error occurs.

### write

    public void write (int c)

Writes the specified `char` to the piped output stream. If a thread was reading data characters from the connected piped input stream, but the thread is no longer alive, then an `IOException` is thrown.

Implements the `write` method of `Writer`.

Parameters
`c` | `int`: the `char` to be written.

Throws
`IOException` | if the pipe is `broken`, `unconnected`, closed or an I/O error occurs.

### write

    public void write (char[] cbuf,
                    int off,
                    int len)

Writes `len` characters from the specified character array starting at offset `off` to this piped output stream. This method blocks until all the characters are written to the output stream. If a thread was reading data characters from the connected piped input stream, but the thread is no longer alive, then an `IOException` is thrown.

Parameters
`cbuf` | `char`: the data.
`off` | `int`: the start offset in the data.
`len` | `int`: the number of characters to write.

Throws
`IOException` | if the pipe is `broken`, `unconnected`, closed or an I/O error occurs.

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